-
Helcionella is a
genus of helcionellid, a
fossil marine invertebrate animal that is
considered to be a
mollusk and may
possibly be a gastropod. The s****...
- gastropods, or
might not be
gastropods at all.
Early Cambrian species such as
Helcionella, Barskovia, and
Scenella are no
longer considered gastropods, and the...
-
subsidua Bathyuriscus-Elrathina &
Bolaspidella Zones. A brachiopod.
Helcionella "H."
arguta Bathyuriscus fimbriatus &
Bolaspidella contracta Subzones...
- America.
Teiichi KOBAYASHI (1987). "The
Ancestry of the Cephalopoda: From
Helcionella to Plectronoceras".
Proceedings of the ****an Academy,
Series B: Physical...
- more derived. The
Helconellidae (Wenz, 1938)
represented by the
genus Helcionella (Grabau & Shimer, 1909) more
closely resembles the
monoplacophoran ancestor...
- †Gnathodus †Gravicalymene †Greenops †Hallipterus †Hardieopterus †Hazelia †
Helcionella †Hexactinellid †Hindeodus †Holonema †Holopea †Holoptychius †Holoptychus...
-
Cambrian (Terreneuvian)
Zhujiaqing Formation China A new
genus for "
Helcionella" nana Chen &
Zhang (1980).
Protonoetia manipurensis Sp. nov
Valid Sijagurumayum...
-
several fossils:
Acrothele bellapunctata Ellipsocephalus nordenskjoldi Helcionella subrugosa Holmia grandis, H.
kjerulfi Kjerulfia lata
Marocella antiqua...
-
marginiata – or
unidentified comparable form †Hardyoides †Hastagnostus †
Helcionella †
Helcionella A –
informal †Heliomeroides †Heliomeroides
teres †Helopora †Hemirhodon...
-
enigmatic body
fossils such as hyoliths; the single-s****ed,
mollusk Helcionella;
Scenella hermitensis; and Chancelloria.
Although trace fossils are common...
